Lot - A RCA 44BX ribbon velocity microphone
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RCA 44BX Ribbon Microphone #C1914 (Vintage) - Vintage King
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File:RCA 44-A Velocity Microphone.jpg - Wikimedia Commons
The story of the man behind the RCA 44 and 77 ribbon microphones
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Introduction\ RCA model 44 Microphone – Modesto Radio Museum
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AEA R44CX - The original with extra power – Audiosteps Commerce
